An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.
NSN 6145-01-202-9555
NSN 5950-01-323-6906
NSN 6620-01-223-5998
NSN 6220-01-453-4975
NSN 5930-01-566-8240
NSN 6240-01-575-0613
NSN 6610-01-275-8382
NSN 5998-00-956-6518
NSN 5975-01-158-6150
NSN 5910-01-500-1812
NSN 5835-01-442-6079
NSN 6150-01-657-6311